html,body{height:100%;margin:0;overflow:hidden;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}*{box-sizing:border-box}button,.btn{box-shadow:0 8px 18px #00000059;text-shadow:0 2px 6px rgba(0,0,0,.85);transition:transform .12s ease,filter .12s ease}button:active,.btn:active{transform:scale(.97)}.btn{border:none;cursor:pointer;border-radius:16px;padding:12px 18px;font-weight:700;box-shadow:0 10px 28px #0000002e;transition:transform .08s ease,box-shadow .08s ease,filter .08s ease}.btn:active{transform:translateY(1px) scale(.99);box-shadow:0 6px 18px #00000029;filter:brightness(.98)}.field-shadow{box-shadow:0 10px 26px #0000001f}.card-shadow{box-shadow:0 18px 44px #00000038}